drivers/bluetooth/ath3k.c - maze/linux - Git at Google

 /*
  * Copyright (c) 2008-2009 Atheros Communications Inc.
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  */


 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/device.h>
 #include <linux/firmware.h>
 #include <linux/usb.h>
 #include <net/bluetooth/bluetooth.h>

 #define VERSION "1.0"
 #define ATH3K_FIRMWARE	"ath3k-1.fw"

 #define ATH3K_DNLOAD				0x01
 #define ATH3K_GETSTATE				0x05
 #define ATH3K_SET_NORMAL_MODE			0x07
 #define ATH3K_GETVERSION			0x09
 #define USB_REG_SWITCH_VID_PID			0x0a

 #define ATH3K_MODE_MASK				0x3F
 #define ATH3K_NORMAL_MODE			0x0E

 #define ATH3K_PATCH_UPDATE			0x80
 #define ATH3K_SYSCFG_UPDATE			0x40

 #define ATH3K_XTAL_FREQ_26M			0x00
 #define ATH3K_XTAL_FREQ_40M			0x01
 #define ATH3K_XTAL_FREQ_19P2			0x02
 #define ATH3K_NAME_LEN				0xFF

 struct ath3k_version {
 	unsigned int	rom_version;
 	unsigned int	build_version;
 	unsigned int	ram_version;
 	unsigned char	ref_clock;
 	unsigned char	reserved[0x07];
 };

 static struct usb_device_id ath3k_table[] = {
 	/* Atheros AR3011 */
 	{ USB_DEVICE(0x0CF3, 0x3000) },

 	/* Atheros AR3011 with sflash firmware*/
 	{ USB_DEVICE(0x0CF3, 0x3002) },
 	{ USB_DEVICE(0x0CF3, 0xE019) },
 	{ USB_DEVICE(0x13d3, 0x3304) },
 	{ USB_DEVICE(0x0930, 0x0215) },
 	{ USB_DEVICE(0x0489, 0xE03D) },
 	{ USB_DEVICE(0x0489, 0xE027) },

 	/* Atheros AR9285 Malbec with sflash firmware */
 	{ USB_DEVICE(0x03F0, 0x311D) },

 	/* Atheros AR3012 with sflash firmware*/
 	{ USB_DEVICE(0x0CF3, 0x0036) },
 	{ USB_DEVICE(0x0CF3, 0x3004) },
 	{ USB_DEVICE(0x0CF3, 0x3008) },
 	{ USB_DEVICE(0x0CF3, 0x311D) },
 	{ USB_DEVICE(0x0CF3, 0x817a) },
 	{ USB_DEVICE(0x13d3, 0x3375) },
 	{ USB_DEVICE(0x04CA, 0x3004) },
 	{ USB_DEVICE(0x04CA, 0x3005) },
 	{ USB_DEVICE(0x04CA, 0x3006) },
 	{ USB_DEVICE(0x04CA, 0x3008) },
 	{ USB_DEVICE(0x13d3, 0x3362) },
 	{ USB_DEVICE(0x0CF3, 0xE004) },
 	{ USB_DEVICE(0x0930, 0x0219) },
 	{ USB_DEVICE(0x0489, 0xe057) },
 	{ USB_DEVICE(0x13d3, 0x3393) },
 	{ USB_DEVICE(0x0489, 0xe04e) },
 	{ USB_DEVICE(0x0489, 0xe056) },

 	/* Atheros AR5BBU12 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xE02C) },

 	/* Atheros AR5BBU22 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xE03C) },
 	{ USB_DEVICE(0x0489, 0xE036) },

 	{ }	/* Terminating entry */
 };

 MODULE_DEVICE_TABLE(usb, ath3k_table);

 #define BTUSB_ATH3012		0x80
 /* This table is to load patch and sysconfig files
  * for AR3012 */
 static struct usb_device_id ath3k_blist_tbl[] = {

 	/* Atheros AR3012 with sflash firmware*/
 	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },

 	/* Atheros AR5BBU22 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },

 	{ }	/* Terminating entry */
 };

 #define USB_REQ_DFU_DNLOAD	1
 #define BULK_SIZE		4096
 #define FW_HDR_SIZE		20

 static int ath3k_load_firmware(struct usb_device *udev,
 				const struct firmware *firmware)
 {
 	u8 *send_buf;
 	int err, pipe, len, size, sent = 0;
 	int count = firmware->size;

 	BT_DBG("udev %p", udev);

 	pipe = usb_sndctrlpipe(udev, 0);

 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 	if (!send_buf) {
 		BT_ERR("Can't allocate memory chunk for firmware");
 		return -ENOMEM;
 	}

 	memcpy(send_buf, firmware->data, 20);
 	if ((err = usb_control_msg(udev, pipe,
 				USB_REQ_DFU_DNLOAD,
 				USB_TYPE_VENDOR, 0, 0,
 				send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
 		BT_ERR("Can't change to loading configuration err");
 		goto error;
 	}
 	sent += 20;
 	count -= 20;

 	while (count) {
 		size = min_t(uint, count, BULK_SIZE);
 		pipe = usb_sndbulkpipe(udev, 0x02);
 		memcpy(send_buf, firmware->data + sent, size);

 		err = usb_bulk_msg(udev, pipe, send_buf, size,
 					&len, 3000);

 		if (err || (len != size)) {
 			BT_ERR("Error in firmware loading err = %d,"
 				"len = %d, size = %d", err, len, size);
 			goto error;
 		}

 		sent  += size;
 		count -= size;
 	}

 error:
 	kfree(send_buf);
 	return err;
 }

 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 {
 	int pipe = 0;

 	pipe = usb_rcvctrlpipe(udev, 0);
 	return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 			USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 			state, 0x01, USB_CTRL_SET_TIMEOUT);
 }

 static int ath3k_get_version(struct usb_device *udev,
 			struct ath3k_version *version)
 {
 	int pipe = 0;

 	pipe = usb_rcvctrlpipe(udev, 0);
 	return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 			USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,
 			sizeof(struct ath3k_version),
 			USB_CTRL_SET_TIMEOUT);
 }

 static int ath3k_load_fwfile(struct usb_device *udev,
 		const struct firmware *firmware)
 {
 	u8 *send_buf;
 	int err, pipe, len, size, count, sent = 0;
 	int ret;

 	count = firmware->size;

 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 	if (!send_buf) {
 		BT_ERR("Can't allocate memory chunk for firmware");
 		return -ENOMEM;
 	}

 	size = min_t(uint, count, FW_HDR_SIZE);
 	memcpy(send_buf, firmware->data, size);

 	pipe = usb_sndctrlpipe(udev, 0);
 	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 			USB_TYPE_VENDOR, 0, 0, send_buf,
 			size, USB_CTRL_SET_TIMEOUT);
 	if (ret < 0) {
 		BT_ERR("Can't change to loading configuration err");
 		kfree(send_buf);
 		return ret;
 	}

 	sent += size;
 	count -= size;

 	while (count) {
 		size = min_t(uint, count, BULK_SIZE);
 		pipe = usb_sndbulkpipe(udev, 0x02);

 		memcpy(send_buf, firmware->data + sent, size);

 		err = usb_bulk_msg(udev, pipe, send_buf, size,
 					&len, 3000);
 		if (err || (len != size)) {
 			BT_ERR("Error in firmware loading err = %d,"
 				"len = %d, size = %d", err, len, size);
 			kfree(send_buf);
 			return err;
 		}
 		sent  += size;
 		count -= size;
 	}

 	kfree(send_buf);
 	return 0;
 }

 static int ath3k_switch_pid(struct usb_device *udev)
 {
 	int pipe = 0;

 	pipe = usb_sndctrlpipe(udev, 0);
 	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 			USB_TYPE_VENDOR, 0, 0,
 			NULL, 0, USB_CTRL_SET_TIMEOUT);
 }

 static int ath3k_set_normal_mode(struct usb_device *udev)
 {
 	unsigned char fw_state;
 	int pipe = 0, ret;

 	ret = ath3k_get_state(udev, &fw_state);
 	if (ret < 0) {
 		BT_ERR("Can't get state to change to normal mode err");
 		return ret;
 	}

 	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 		BT_DBG("firmware was already in normal mode");
 		return 0;
 	}

 	pipe = usb_sndctrlpipe(udev, 0);
 	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 			USB_TYPE_VENDOR, 0, 0,
 			NULL, 0, USB_CTRL_SET_TIMEOUT);
 }

 static int ath3k_load_patch(struct usb_device *udev)
 {
 	unsigned char fw_state;
 	char filename[ATH3K_NAME_LEN] = {0};
 	const struct firmware *firmware;
 	struct ath3k_version fw_version, pt_version;
 	int ret;

 	ret = ath3k_get_state(udev, &fw_state);
 	if (ret < 0) {
 		BT_ERR("Can't get state to change to load ram patch err");
 		return ret;
 	}

 	if (fw_state & ATH3K_PATCH_UPDATE) {
 		BT_DBG("Patch was already downloaded");
 		return 0;
 	}

 	ret = ath3k_get_version(udev, &fw_version);
 	if (ret < 0) {
 		BT_ERR("Can't get version to change to load ram patch err");
 		return ret;
 	}

 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 		fw_version.rom_version);

 	ret = request_firmware(&firmware, filename, &udev->dev);
 	if (ret < 0) {
 		BT_ERR("Patch file not found %s", filename);
 		return ret;
 	}

 	pt_version.rom_version = *(int *)(firmware->data + firmware->size - 8);
 	pt_version.build_version = *(int *)
 		(firmware->data + firmware->size - 4);

 	if ((pt_version.rom_version != fw_version.rom_version) ||
 		(pt_version.build_version <= fw_version.build_version)) {
 		BT_ERR("Patch file version did not match with firmware");
 		release_firmware(firmware);
 		return -EINVAL;
 	}

 	ret = ath3k_load_fwfile(udev, firmware);
 	release_firmware(firmware);

 	return ret;
 }

 static int ath3k_load_syscfg(struct usb_device *udev)
 {
 	unsigned char fw_state;
 	char filename[ATH3K_NAME_LEN] = {0};
 	const struct firmware *firmware;
 	struct ath3k_version fw_version;
 	int clk_value, ret;

 	ret = ath3k_get_state(udev, &fw_state);
 	if (ret < 0) {
 		BT_ERR("Can't get state to change to load configuration err");
 		return -EBUSY;
 	}

 	ret = ath3k_get_version(udev, &fw_version);
 	if (ret < 0) {
 		BT_ERR("Can't get version to change to load ram patch err");
 		return ret;
 	}

 	switch (fw_version.ref_clock) {

 	case ATH3K_XTAL_FREQ_26M:
 		clk_value = 26;
 		break;
 	case ATH3K_XTAL_FREQ_40M:
 		clk_value = 40;
 		break;
 	case ATH3K_XTAL_FREQ_19P2:
 		clk_value = 19;
 		break;
 	default:
 		clk_value = 0;
 		break;
 	}

 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 		fw_version.rom_version, clk_value, ".dfu");

 	ret = request_firmware(&firmware, filename, &udev->dev);
 	if (ret < 0) {
 		BT_ERR("Configuration file not found %s", filename);
 		return ret;
 	}

 	ret = ath3k_load_fwfile(udev, firmware);
 	release_firmware(firmware);

 	return ret;
 }

 static int ath3k_probe(struct usb_interface *intf,
 			const struct usb_device_id *id)
 {
 	const struct firmware *firmware;
 	struct usb_device *udev = interface_to_usbdev(intf);
 	int ret;

 	BT_DBG("intf %p id %p", intf, id);

 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 		return -ENODEV;

 	/* match device ID in ath3k blacklist table */
 	if (!id->driver_info) {
 		const struct usb_device_id *match;
 		match = usb_match_id(intf, ath3k_blist_tbl);
 		if (match)
 			id = match;
 	}

 	/* load patch and sysconfig files for AR3012 */
 	if (id->driver_info & BTUSB_ATH3012) {

 		/* New firmware with patch and sysconfig files already loaded */
 		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
 			return -ENODEV;

 		ret = ath3k_load_patch(udev);
 		if (ret < 0) {
 			BT_ERR("Loading patch file failed");
 			return ret;
 		}
 		ret = ath3k_load_syscfg(udev);
 		if (ret < 0) {
 			BT_ERR("Loading sysconfig file failed");
 			return ret;
 		}
 		ret = ath3k_set_normal_mode(udev);
 		if (ret < 0) {
 			BT_ERR("Set normal mode failed");
 			return ret;
 		}
 		ath3k_switch_pid(udev);
 		return 0;
 	}

 	ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
 	if (ret < 0) {
 		if (ret == -ENOENT)
 			BT_ERR("Firmware file \"%s\" not found",
 							ATH3K_FIRMWARE);
 		else
 			BT_ERR("Firmware file \"%s\" request failed (err=%d)",
 							ATH3K_FIRMWARE, ret);
 		return ret;
 	}

 	ret = ath3k_load_firmware(udev, firmware);
 	release_firmware(firmware);

 	return ret;
 }

 static void ath3k_disconnect(struct usb_interface *intf)
 {
 	BT_DBG("ath3k_disconnect intf %p", intf);
 }

 static struct usb_driver ath3k_driver = {
 	.name		= "ath3k",
 	.probe		= ath3k_probe,
 	.disconnect	= ath3k_disconnect,
 	.id_table	= ath3k_table,
 	.disable_hub_initiated_lpm = 1,
 };

 module_usb_driver(ath3k_driver);

 MODULE_AUTHOR("Atheros Communications");
 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 MODULE_VERSION(VERSION);
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE(ATH3K_FIRMWARE);
	/*
	* Copyright (c) 2008-2009 Atheros Communications Inc.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	*/


	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/types.h>
	#include <linux/errno.h>
	#include <linux/device.h>
	#include <linux/firmware.h>
	#include <linux/usb.h>
	#include <net/bluetooth/bluetooth.h>

	#define VERSION "1.0"
	#define ATH3K_FIRMWARE "ath3k-1.fw"

	#define ATH3K_DNLOAD 0x01
	#define ATH3K_GETSTATE 0x05
	#define ATH3K_SET_NORMAL_MODE 0x07
	#define ATH3K_GETVERSION 0x09
	#define USB_REG_SWITCH_VID_PID 0x0a

	#define ATH3K_MODE_MASK 0x3F
	#define ATH3K_NORMAL_MODE 0x0E

	#define ATH3K_PATCH_UPDATE 0x80
	#define ATH3K_SYSCFG_UPDATE 0x40

	#define ATH3K_XTAL_FREQ_26M 0x00
	#define ATH3K_XTAL_FREQ_40M 0x01
	#define ATH3K_XTAL_FREQ_19P2 0x02
	#define ATH3K_NAME_LEN 0xFF

	struct ath3k_version {
	unsigned int rom_version;
	unsigned int build_version;
	unsigned int ram_version;
	unsigned char ref_clock;
	unsigned char reserved[0x07];
	};

	static struct usb_device_id ath3k_table[] = {
	/* Atheros AR3011 */
	{ USB_DEVICE(0x0CF3, 0x3000) },

	/* Atheros AR3011 with sflash firmware*/
	{ USB_DEVICE(0x0CF3, 0x3002) },
	{ USB_DEVICE(0x0CF3, 0xE019) },
	{ USB_DEVICE(0x13d3, 0x3304) },
	{ USB_DEVICE(0x0930, 0x0215) },
	{ USB_DEVICE(0x0489, 0xE03D) },
	{ USB_DEVICE(0x0489, 0xE027) },

	/* Atheros AR9285 Malbec with sflash firmware */
	{ USB_DEVICE(0x03F0, 0x311D) },

	/* Atheros AR3012 with sflash firmware*/
	{ USB_DEVICE(0x0CF3, 0x0036) },
	{ USB_DEVICE(0x0CF3, 0x3004) },
	{ USB_DEVICE(0x0CF3, 0x3008) },
	{ USB_DEVICE(0x0CF3, 0x311D) },
	{ USB_DEVICE(0x0CF3, 0x817a) },
	{ USB_DEVICE(0x13d3, 0x3375) },
	{ USB_DEVICE(0x04CA, 0x3004) },
	{ USB_DEVICE(0x04CA, 0x3005) },
	{ USB_DEVICE(0x04CA, 0x3006) },
	{ USB_DEVICE(0x04CA, 0x3008) },
	{ USB_DEVICE(0x13d3, 0x3362) },
	{ USB_DEVICE(0x0CF3, 0xE004) },
	{ USB_DEVICE(0x0930, 0x0219) },
	{ USB_DEVICE(0x0489, 0xe057) },
	{ USB_DEVICE(0x13d3, 0x3393) },
	{ USB_DEVICE(0x0489, 0xe04e) },
	{ USB_DEVICE(0x0489, 0xe056) },

	/* Atheros AR5BBU12 with sflash firmware */
	{ USB_DEVICE(0x0489, 0xE02C) },

	/* Atheros AR5BBU22 with sflash firmware */
	{ USB_DEVICE(0x0489, 0xE03C) },
	{ USB_DEVICE(0x0489, 0xE036) },

	{ } /* Terminating entry */
	};

	MODULE_DEVICE_TABLE(usb, ath3k_table);

	#define BTUSB_ATH3012 0x80
	/* This table is to load patch and sysconfig files
	* for AR3012 */
	static struct usb_device_id ath3k_blist_tbl[] = {

	/* Atheros AR3012 with sflash firmware*/
	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },

	/* Atheros AR5BBU22 with sflash firmware */
	{ USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },

	{ } /* Terminating entry */
	};

	#define USB_REQ_DFU_DNLOAD 1
	#define BULK_SIZE 4096
	#define FW_HDR_SIZE 20

	static int ath3k_load_firmware(struct usb_device *udev,
	const struct firmware *firmware)
	{
	u8 *send_buf;
	int err, pipe, len, size, sent = 0;
	int count = firmware->size;

	BT_DBG("udev %p", udev);

	pipe = usb_sndctrlpipe(udev, 0);

	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
	if (!send_buf) {
	BT_ERR("Can't allocate memory chunk for firmware");
	return -ENOMEM;
	}

	memcpy(send_buf, firmware->data, 20);
	if ((err = usb_control_msg(udev, pipe,
	USB_REQ_DFU_DNLOAD,
	USB_TYPE_VENDOR, 0, 0,
	send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
	BT_ERR("Can't change to loading configuration err");
	goto error;
	}
	sent += 20;
	count -= 20;

	while (count) {
	size = min_t(uint, count, BULK_SIZE);
	pipe = usb_sndbulkpipe(udev, 0x02);
	memcpy(send_buf, firmware->data + sent, size);

	err = usb_bulk_msg(udev, pipe, send_buf, size,
	&len, 3000);

	if (err \|\| (len != size)) {
	BT_ERR("Error in firmware loading err = %d,"
	"len = %d, size = %d", err, len, size);
	goto error;
	}

	sent += size;
	count -= size;
	}

	error:
	kfree(send_buf);
	return err;
	}

	static int ath3k_get_state(struct usb_device udev, unsigned char state)
	{
	int pipe = 0;

	pipe = usb_rcvctrlpipe(udev, 0);
	return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
	USB_TYPE_VENDOR \| USB_DIR_IN, 0, 0,
	state, 0x01, USB_CTRL_SET_TIMEOUT);
	}

	static int ath3k_get_version(struct usb_device *udev,
	struct ath3k_version *version)
	{
	int pipe = 0;

	pipe = usb_rcvctrlpipe(udev, 0);
	return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
	USB_TYPE_VENDOR \| USB_DIR_IN, 0, 0, version,
	sizeof(struct ath3k_version),
	USB_CTRL_SET_TIMEOUT);
	}

	static int ath3k_load_fwfile(struct usb_device *udev,
	const struct firmware *firmware)
	{
	u8 *send_buf;
	int err, pipe, len, size, count, sent = 0;
	int ret;

	count = firmware->size;

	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
	if (!send_buf) {
	BT_ERR("Can't allocate memory chunk for firmware");
	return -ENOMEM;
	}

	size = min_t(uint, count, FW_HDR_SIZE);
	memcpy(send_buf, firmware->data, size);

	pipe = usb_sndctrlpipe(udev, 0);
	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
	USB_TYPE_VENDOR, 0, 0, send_buf,
	size, USB_CTRL_SET_TIMEOUT);
	if (ret < 0) {
	BT_ERR("Can't change to loading configuration err");
	kfree(send_buf);
	return ret;
	}

	sent += size;
	count -= size;

	while (count) {
	size = min_t(uint, count, BULK_SIZE);
	pipe = usb_sndbulkpipe(udev, 0x02);

	memcpy(send_buf, firmware->data + sent, size);

	err = usb_bulk_msg(udev, pipe, send_buf, size,
	&len, 3000);
	if (err \|\| (len != size)) {
	BT_ERR("Error in firmware loading err = %d,"
	"len = %d, size = %d", err, len, size);
	kfree(send_buf);
	return err;
	}
	sent += size;
	count -= size;
	}

	kfree(send_buf);
	return 0;
	}

	static int ath3k_switch_pid(struct usb_device *udev)
	{
	int pipe = 0;

	pipe = usb_sndctrlpipe(udev, 0);
	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
	USB_TYPE_VENDOR, 0, 0,
	NULL, 0, USB_CTRL_SET_TIMEOUT);
	}

	static int ath3k_set_normal_mode(struct usb_device *udev)
	{
	unsigned char fw_state;
	int pipe = 0, ret;

	ret = ath3k_get_state(udev, &fw_state);
	if (ret < 0) {
	BT_ERR("Can't get state to change to normal mode err");
	return ret;
	}

	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
	BT_DBG("firmware was already in normal mode");
	return 0;
	}

	pipe = usb_sndctrlpipe(udev, 0);
	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
	USB_TYPE_VENDOR, 0, 0,
	NULL, 0, USB_CTRL_SET_TIMEOUT);
	}

	static int ath3k_load_patch(struct usb_device *udev)
	{
	unsigned char fw_state;
	char filename[ATH3K_NAME_LEN] = {0};
	const struct firmware *firmware;
	struct ath3k_version fw_version, pt_version;
	int ret;

	ret = ath3k_get_state(udev, &fw_state);
	if (ret < 0) {
	BT_ERR("Can't get state to change to load ram patch err");
	return ret;
	}

	if (fw_state & ATH3K_PATCH_UPDATE) {
	BT_DBG("Patch was already downloaded");
	return 0;
	}

	ret = ath3k_get_version(udev, &fw_version);
	if (ret < 0) {
	BT_ERR("Can't get version to change to load ram patch err");
	return ret;
	}

	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
	fw_version.rom_version);

	ret = request_firmware(&firmware, filename, &udev->dev);
	if (ret < 0) {
	BT_ERR("Patch file not found %s", filename);
	return ret;
	}

	pt_version.rom_version = (int )(firmware->data + firmware->size - 8);
	pt_version.build_version = (int )
	(firmware->data + firmware->size - 4);

	if ((pt_version.rom_version != fw_version.rom_version) \|\|
	(pt_version.build_version <= fw_version.build_version)) {
	BT_ERR("Patch file version did not match with firmware");
	release_firmware(firmware);
	return -EINVAL;
	}

	ret = ath3k_load_fwfile(udev, firmware);
	release_firmware(firmware);

	return ret;
	}

	static int ath3k_load_syscfg(struct usb_device *udev)
	{
	unsigned char fw_state;
	char filename[ATH3K_NAME_LEN] = {0};
	const struct firmware *firmware;
	struct ath3k_version fw_version;
	int clk_value, ret;

	ret = ath3k_get_state(udev, &fw_state);
	if (ret < 0) {
	BT_ERR("Can't get state to change to load configuration err");
	return -EBUSY;
	}

	ret = ath3k_get_version(udev, &fw_version);
	if (ret < 0) {
	BT_ERR("Can't get version to change to load ram patch err");
	return ret;
	}

	switch (fw_version.ref_clock) {

	case ATH3K_XTAL_FREQ_26M:
	clk_value = 26;
	break;
	case ATH3K_XTAL_FREQ_40M:
	clk_value = 40;
	break;
	case ATH3K_XTAL_FREQ_19P2:
	clk_value = 19;
	break;
	default:
	clk_value = 0;
	break;
	}

	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
	fw_version.rom_version, clk_value, ".dfu");

	ret = request_firmware(&firmware, filename, &udev->dev);
	if (ret < 0) {
	BT_ERR("Configuration file not found %s", filename);
	return ret;
	}

	ret = ath3k_load_fwfile(udev, firmware);
	release_firmware(firmware);

	return ret;
	}

	static int ath3k_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	const struct firmware *firmware;
	struct usb_device *udev = interface_to_usbdev(intf);
	int ret;

	BT_DBG("intf %p id %p", intf, id);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
	return -ENODEV;

	/* match device ID in ath3k blacklist table */
	if (!id->driver_info) {
	const struct usb_device_id *match;
	match = usb_match_id(intf, ath3k_blist_tbl);
	if (match)
	id = match;
	}

	/* load patch and sysconfig files for AR3012 */
	if (id->driver_info & BTUSB_ATH3012) {

	/* New firmware with patch and sysconfig files already loaded */
	if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
	return -ENODEV;

	ret = ath3k_load_patch(udev);
	if (ret < 0) {
	BT_ERR("Loading patch file failed");
	return ret;
	}
	ret = ath3k_load_syscfg(udev);
	if (ret < 0) {
	BT_ERR("Loading sysconfig file failed");
	return ret;
	}
	ret = ath3k_set_normal_mode(udev);
	if (ret < 0) {
	BT_ERR("Set normal mode failed");
	return ret;
	}
	ath3k_switch_pid(udev);
	return 0;
	}

	ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
	if (ret < 0) {
	if (ret == -ENOENT)
	BT_ERR("Firmware file \"%s\" not found",
	ATH3K_FIRMWARE);
	else
	BT_ERR("Firmware file \"%s\" request failed (err=%d)",
	ATH3K_FIRMWARE, ret);
	return ret;
	}

	ret = ath3k_load_firmware(udev, firmware);
	release_firmware(firmware);

	return ret;
	}

	static void ath3k_disconnect(struct usb_interface *intf)
	{
	BT_DBG("ath3k_disconnect intf %p", intf);
	}

	static struct usb_driver ath3k_driver = {
	.name = "ath3k",
	.probe = ath3k_probe,
	.disconnect = ath3k_disconnect,
	.id_table = ath3k_table,
	.disable_hub_initiated_lpm = 1,
	};

	module_usb_driver(ath3k_driver);

	MODULE_AUTHOR("Atheros Communications");
	MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
	MODULE_VERSION(VERSION);
	MODULE_LICENSE("GPL");
	MODULE_FIRMWARE(ATH3K_FIRMWARE);